Experiment One is based upon the assumption that the perseveration/termination of one evaluative response during the formation of another is an essential ingredient in judgmental shifts. Therefore, an attempt was made in this experiment to manipulate only the perseveration/termination of an initial response while holding all other stimulus characteristics constant. It may be possible to accomplish this by using procedures refined in work on the effects of task interruption (for summaries see Butterfield, 1964; Deutsch, 1954; Weiner, 1966).
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